PRT12MF-DES PRT82MF PRT84MF Operating Manual.doc
Each key pressed is
transmitted separately
as a 8-bit number
without parity bits
Each key pressed is immediately transmitted to the host
controller as a sequence of 8 bits (XXXXXXXX) where
XXXXXXXX represents the code of the pressed key
supplemented by two control bits (E and P). The E represents
the even bit calculated from the first half of a transmitted
code where P represents the parity of a second half of the bit
stream. Key coding as in Table A.
1-6 keys long PIN
transmitted as Wiegand
26 bit stream with
control bits
1-6 keys long PIN, each key represented by 4-bit long codes
(key codes according to table B). Reader sends data after six
keys are pressed or earlier when # key is pressed. Key’s
buffer is cleared if no keys have not been entered within
programmed timeout. Examples:
Keys entered “1234#” – code transmitted “001234”
Keys entered “123456” – code transmitted “123456”
Table A. 8-bit key coding
Table B. 4-bit key coding
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